Supercritical Fluids-Assisted Processing Using CO2 Foaming to Enhance the Dispersion of Nanofillers in Poly(butylene succinate)-Based Nanocomposites and the Conductivity

Huang, An; Song, Xincheng; Liu, Fan; Wang, Haokun; Geng, Lihong; Wang, Hankun; Quan, Yi; Peng, Xiangfang

doi:10.1007/s10924-022-02389-2

Cited by 7 publications

(3 citation statements)

References 47 publications

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“…Besides chain extension and branching, several additives, such as organic montmorillonite (OMMT) [216], cellulose nanocrystals (CNC) [4,15], carbon black (CB) [217], halloysite nanotubes [337], carbon nanotubes [338], carbon fibres [339], or chitin nanocrystals [340], can also be employed to improve the melt strength and at the same time serve as nucleating agents. Zhou et al [216] employed OMMT to improve the crystallization behaviour of chain-extended PBS and at the same time act as a nucleating agent during foaming.…”

Section: Poly(butylene Succinate) (Pbs)mentioning

confidence: 99%

Forefront Research of Foaming Strategies on Biodegradable Polymers and Their Composites by Thermal or Melt-Based Processing Technologies: Advances and Perspectives

Gonçalves,

Reis,

Fernandes

2024

Polymers

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The last few decades have witnessed significant advances in the development of polymeric-based foam materials. These materials find several practical applications in our daily lives due to their characteristic properties such as low density, thermal insulation, and porosity, which are important in packaging, in building construction, and in biomedical applications, respectively. The first foams with practical applications used polymeric materials of petrochemical origin. However, due to growing environmental concerns, considerable efforts have been made to replace some of these materials with biodegradable polymers. Foam processing has evolved greatly in recent years due to improvements in existing techniques, such as the use of supercritical fluids in extrusion foaming and foam injection moulding, as well as the advent or adaptation of existing techniques to produce foams, as in the case of the combination between additive manufacturing and foam technology. The use of supercritical CO2 is especially advantageous in the production of porous structures for biomedical applications, as CO2 is chemically inert and non-toxic; in addition, it allows for an easy tailoring of the pore structure through processing conditions. Biodegradable polymeric materials, despite their enormous advantages over petroleum-based materials, present some difficulties regarding their potential use in foaming, such as poor melt strength, slow crystallization rate, poor processability, low service temperature, low toughness, and high brittleness, which limits their field of application. Several strategies were developed to improve the melt strength, including the change in monomer composition and the use of chemical modifiers and chain extenders to extend the chain length or create a branched molecular structure, to increase the molecular weight and the viscosity of the polymer. The use of additives or fillers is also commonly used, as fillers can improve crystallization kinetics by acting as crystal-nucleating agents. Alternatively, biodegradable polymers can be blended with other biodegradable polymers to combine certain properties and to counteract certain limitations. This work therefore aims to provide the latest advances regarding the foaming of biodegradable polymers. It covers the main foaming techniques and their advances and reviews the uses of biodegradable polymers in foaming, focusing on the chemical changes of polymers that improve their foaming ability. Finally, the challenges as well as the main opportunities presented reinforce the market potential of the biodegradable polymer foam materials.

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Section: Poly(butylene Succinate) (Pbs)mentioning

confidence: 99%

Forefront Research of Foaming Strategies on Biodegradable Polymers and Their Composites by Thermal or Melt-Based Processing Technologies: Advances and Perspectives

Gonçalves,

Reis,

Fernandes

2024

Polymers

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“…Generally to improve the electrical conductivity of polymers, conductive nanofillers are widely used [24][25][26][27][28], such as carbon nanotubes, carbon fiber, graphene, etc. For instance, Wang et al [26] prepared cellulose-PBS films filled with multiwalled carbon nanotubes (MWCNTs).…”

Section: Introductionmentioning

confidence: 99%

“…The electrical conductivity of MWCNT/CE-PBS film was improved by 8-9 orders of magnitude from 2.5 × 10 -14 to 1.3 × 10 -5 S/m. Huang et al [27] also prepared PBS/CNT conductive polymer nanocomposites with varied CNT content were prepared by a HAAKE torque rheometer. The conductivity of PBS/5 wt% CNT nanocomposite increased to 33.3 S m −1 , which was an increase of 16 orders of magnitude in comparison with pure PBS of 8.23× 10 -15 S m −1 .…”

Section: Introductionmentioning

confidence: 99%

Synergistic effect of carbon nanotube on improving thermal stability, flame retardancy, and electrical conductivity of poly(butylene succinate)/piperazine pyrophosphate composites

Wang,

Meng,

Zhu

et al. 2023

Colloid Polym Sci

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Biodegradable poly (butylene succinate) (PBS) is considered as promising material for replacing conventional nondegradable polymers in various engineering fields, but its applications are limited by inherent flammability and low electrical conductivity. In this study, the synergistic effect of carbon nanotube (CNTs) on improving thermal stability, flame retardancy and electrical conductivity of poly(butylene succinate)/piperazine pyrophosphate (PBS/PAPP) composites was investigated. Thermogravimetric analysis (TGA) demonstrated that the addition of CNTs could improve the thermal stability of PBS/PAPP composites, where the maximum mass loss temperature (Tmax) of PBS/18PAPP-2CNT increased by 9.1 o C in comparison with that of PBS/20PAPP. Meanwhile, PBS/18PAPP-2CNT exhibited the optimal flame retardancy with limited oxygen index (LOI) of 30.1%, V0 rating in UL-94 vertical burning test and 79.6% reduction on the peak of heat release rate (PHRR) in cone calorimeter test. The synergistic effect of CNTs and PAPP was beneficial to form high-quality char layer, resulting in the enhanced flame retardancy of PBS. Furthermore, the CNTs could improve the electrical conductivity of PBS/PAPP composites with low percolation threshold of 1.75 wt%, which was ascribed to the "volume excluded effect" of PAPP. Thus, the current work provided an efficient strategy to prepare multifunctional PBS composites to meet various engineering applications.

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Poly(Butylene Succinate). Functional Nanocomposite Materials and Applications

Medellín-Banda

Navarro-Rodríguez

Jesús‐Téllez

et al. 2023

Green-Based Nanocomposite Materials and Applications

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Supercritical Fluids-Assisted Processing Using CO2 Foaming to Enhance the Dispersion of Nanofillers in Poly(butylene succinate)-Based Nanocomposites and the Conductivity

Abstract: Supercritical fluids-assisted processing using CO2 foaming to enhance the dispersion of nanofillers in poly(butylene succinate)-based nanocomposites and the conductivity

Cited by 7 publications

References 47 publications

Forefront Research of Foaming Strategies on Biodegradable Polymers and Their Composites by Thermal or Melt-Based Processing Technologies: Advances and Perspectives

Forefront Research of Foaming Strategies on Biodegradable Polymers and Their Composites by Thermal or Melt-Based Processing Technologies: Advances and Perspectives

Synergistic effect of carbon nanotube on improving thermal stability, flame retardancy, and electrical conductivity of poly(butylene succinate)/piperazine pyrophosphate composites

Poly(Butylene Succinate). Functional Nanocomposite Materials and Applications

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